Bring the magic of the ocean to your little one’s nursery with the Under the Sea Baby Mobile, a whimsical crochet project that’s full of charm and gentle movement! 🌊🧶 Featuring a smiling jellyfish, cheerful whale, happy starfish, playful clownfish, and soft seaweed accents, this mobile captures the beauty of the underwater world in sweet stitches and soothing colors. It’s the perfect way to create a calming, imaginative space for babies to dream and explore.
Ideal for crocheters who love crafting adorable characters and themed décor, this pattern invites you to stitch up a sea of smiles and soft textures. Mix and match colors, add tiny bubbles, or personalize each sea creature to make it truly one-of-a-kind. The Under the Sea Baby Mobile is a joyful way to stitch up wonder, warmth, and a sprinkle of handmade ocean magic—one loop at a time! 🧵🐠💙
🐚 Under the Sea Baby Mobile Crochet Pattern
Bring a splash of ocean wonder into your nursery with this charming Under the Sea Crochet Mobile! Featuring a happy jellyfish, playful whale, bright clownfish, cheerful starfish, and a sweet pink octopus, this mobile transforms your baby’s room into a gentle underwater dreamscape. 🌊✨
Each sea creature is handmade with soft pastel yarns, creating a soothing, colorful design perfect for both modern and coastal-style nurseries.
✨ Skill Level
Intermediate – Best suited for crocheters with basic amigurumi experience (magic ring, increase, decrease, color changes, and sewing small parts).
📏 Finished Size
- Mobile ring diameter: 26–28 cm (10–11 in)
- Hanging height (from ring to bottom of jellyfish tentacles): 40–45 cm (16–18 in)
🧶 Materials
- Yarn: DK (light worsted) cotton yarn
- Light Blue – 80 g (jellyfish, ring, bubbles)
- Sky Blue – 50 g (whale)
- White – 30 g (whale belly, accents, clownfish stripes)
- Coral Pink – 40 g (octopus)
- Yellow – 30 g (starfish)
- Orange – 40 g (clownfish body)
- Black – 20 g (clownfish stripes, embroidery)
- Light Green – 20 g (seaweed curls)
- Hook: 2.5 mm or 3.0 mm crochet hook
- Stuffing: Polyester fiberfill
- Safety eyes: 6 mm
- Embroidery thread: Black (for smiles), Pink (for blush)
- Metal or wooden mobile ring: 25–28 cm diameter
- Yarn needle, scissors, stitch markers
- String or thread: For hanging the creatures
🔤 Abbreviations (US Terms)
MR – Magic Ring
sc – Single Crochet
inc – Increase (2 sc in same stitch)
dec – Decrease (sc2tog)
ch – Chain
sl st – Slip Stitch
st – Stitch
FO – Fasten Off
🪼 Jellyfish (Centerpiece)
Head (Light Blue)
R1: MR, 6 sc [6]
R2: inc ×6 [12]
R3: (sc, inc) ×6 [18]
R4: (2 sc, inc) ×6 [24]
R5: (3 sc, inc) ×6 [30]
R6: (4 sc, inc) ×6 [36]
R7–13: sc around [36]
R14: (4 sc, dec) ×6 [30]
R15: (3 sc, dec) ×6 [24]
R16: (2 sc, dec) ×6 [18]
FO and stuff firmly.
Ruffled Skirt:
Join yarn to the base.
(sc, hdc, dc, hdc, sc in next st, sl st in next st) repeat around.
FO and weave in ends.
Tentacles (6–8 pcs, alternating light & sky blue)
Ch 45–55, sc in 2nd ch from hook, 2 sc in each st to curl.
Attach evenly around the base.
Face:
- Safety eyes between R8–R9, spaced 6 sts apart.
- Embroider a small curved smile and pink blush.
✅ This matches the long, soft jellyfish centerpiece shown in the reference photo.
🐋 Whale
Body (Sky Blue)
R1: MR, 6 sc [6]
R2: inc ×6 [12]
R3: (sc, inc) ×6 [18]
R4: (2 sc, inc) ×6 [24]
R5: (3 sc, inc) ×6 [30]
R6: (4 sc, inc) ×6 [36]
R7–12: sc around [36]
R13: (4 sc, dec) ×6 [30]
R14: (3 sc, dec) ×6 [24]
R15: (2 sc, dec) ×6 [18]
FO, stuff firmly.
Belly (White)
R1: MR, 6 sc
R2: inc ×6 [12]
R3: (sc, inc) ×6 [18]
R4: (2 sc, inc) ×6 [24]
FO, sew to underside of body.
Fins (Make 2)
R1: MR, 6 sc [6]
R2: inc ×6 [12]
R3–7: sc around [12]
Flatten and sew to each side near mid-body.
Tail (V-Shaped)
Ch 12, sc back 11.
R2: ch 1, (inc, sc 3, inc, sc 3, inc) [17 sts].
R3: sc across, FO.
Fold in half and stitch corners together to form a “V” shape.
Attach to back center of body.
Add eyes and an embroidered smile with pink blush.
✅ Now matches the whale’s distinct, larger fins and tail fin shape in the photo.
🐠 Clownfish
Body (Orange + White + Black)
R1: MR, 6 sc [6]
R2: inc ×6 [12]
R3: (sc, inc) ×6 [18]
R4: (2 sc, inc) ×6 [24]
R5–6: sc around [24]
R7: switch to black – sc around [24]
R8–9: switch to white – sc around [24]
R10–11: switch to orange – sc around [24]
R12: switch to black – sc around [24]
R13–14: switch to white – sc around [24]
R15–16: switch to orange – sc around [24]
R17: switch to black – sc around [24]
R18–19: orange – sc around [24]
R20: (2 sc, dec) ×6 [18]
R21: (sc, dec) ×6 [12]
R22: dec ×6 [6], FO and close.
Fins (Make 3 – Black)
Ch 8, sc in 2nd ch, hdc, dc ×3, hdc, sc, sl st. FO.
Sew top fin centered, side fins slightly below.
Face:
Attach eyes between R5–R6, embroider smile.
✅ Now displays all three signature white stripes seen in the real clownfish photo.
⭐ Starfish
Body (Yellow)
R1: MR, 5 sc [5]
R2: inc ×5 [10]
R3: (sc, inc) ×5 [15]
R4: (2 sc, inc) ×5 [20]
Arms:
For each of 5 arms: ch 8, sc in 2nd ch from hook, hdc, dc ×4, hdc, sl st back to base.
Move 4 sts and repeat for all 5 arms.
Stuff lightly, embroider eyes and smile.
🐙 Octopus
Head (Coral Pink)
R1: MR, 6 sc [6]
R2: inc ×6 [12]
R3: (sc, inc) ×6 [18]
R4: (2 sc, inc) ×6 [24]
R5: (3 sc, inc) ×6 [30]
R6–9: sc around [30]
R10: (3 sc, dec) ×6 [24]
R11: (2 sc, dec) ×6 [18]
R12: (sc, dec) ×6 [12]
FO, stuff firmly.
Tentacles (Make 8)
Ch 25, 2 sc in each ch to create curls. FO.
Attach evenly around base.
Add eyes, smile, and pink blush.
🐢 Optional Seahorse (Cream + Mint)
Body:
R1: MR, 6 sc
R2: inc ×6 [12]
R3–8: sc around [12]
R9: (2 sc, inc) ×4 [16]
R10–14: sc around [16]
R15: (2 sc, dec) ×4 [12]
Tail: ch 12, 2 sc in each → curl.
Add fin and small safety eye.
🌿 Seaweed & Bubbles
Seaweed (Light Green):
Ch 40, 2 sc in each ch → tight curl. Make 3–5 curls.
Bubbles (Light Blue):
R1: MR, 6 sc
R2: inc ×6 [12]
R3: sc around [12]
R4: (sc, dec) ×4 [8]
Stuff lightly, FO.
Attach bubbles at varying heights between creatures.
🌀 Mobile Ring Cover
Ring Wrap (Light Blue):
Ch 160 (adjust for ring circumference).
Rows 1–6: sc across.
Wrap around the ring and sew edges together on the inside seam.
🧵 Assembly
1️⃣ Cover the mobile ring completely with the crochet wrap.
2️⃣ Cut equal hanging cords (30–40 cm).
3️⃣ Attach sea creatures evenly:
- Jellyfish in the center (lowest)
- Whale opposite clownfish
- Starfish and octopus on alternating sides
4️⃣ Add seaweed and bubbles for extra depth.
5️⃣ Gather all cords together at the top into one loop for hanging.
6️⃣ Adjust until perfectly balanced.
💡 Finishing Touches
✨ Hang bubbles and seaweed at different heights for a floating effect.
✨ Use transparent nylon thread for an invisible, airy look.
✨ Double-knot all hanging cords securely for safety.
🧸 Final Look
Your Under the Sea Crochet Baby Mobile is ready! 🪼🐋🐠
This mobile captures the magic of ocean life — from the jellyfish’s flowing tentacles to the clownfish’s cheerful stripes. Hang it above your baby’s crib or changing table for a gentle, whimsical motion that soothes and delights. 💙
